A Ukrainian businessman painted in the Mueller report as a sinister link to Russia was actually a "sensitive" intelligence source for the US State Department who informed on Ukrainian and Russian issues - and passed messages between the Washington and Kiev, according to The Hill's John Solomon.

Konstantin Kilimnik, who worked for Trump campaign chairman Paul Manafort, was described on page 6 of the Mueller report as having "ties to Russian intelligence" - and was cast in a sinister light as a potential threat to democracy. Mueller completely omitted the fact that Kilimnik was working as an informant and intermediary between America and Ukraine, and subsequently indicted him for obstruction of justice.

Kilimnik was not just any run-of-the-mill source, either.

He interacted with the chief political officer at the U.S. Embassy in Kiev, sometimes meeting several times a week to provide information on the Ukraine government. He relayed messages back to Ukraine's leaders and delivered written reports to U.S. officials via emails that stretched on for thousands of words, the memos show.

The FBI knew all of this, well before the Mueller investigation concluded. -The Hill

What's more, the chief political officer at the Kiev embassy from 2014 to 2017, Alan Purcell, told the FBI that State officials - including senior embassy officials Alexander Kasanof and Eric Schultz, thought Klimnik was such a valuable asset that they wouldn't mention his name in official cables out of fear that WikiLeaks would expose him.

"Purcell described what he considered an unusual level of discretion that was taken with handling Kilimnik," said one FBI interview report reviewed by Solomon. "Normally the head of the political section would not handle sources, but Kasanof informed Purcell that KILIMNIK was a sensitive source."

Purcell told the FBI that Kilimnik provided "detailed information about OB (Ukraine's opposition bloc) inner workings" that sometimes was so valuable it was forwarded immediately to the ambassador. Purcell learned that other Western governments relied on Kilimnik as a source, too.

"One time, in a meeting with the Italian embassy, Purcell heard the Italian ambassador echo a talking point that was strikingly familiar to the point Kilimnik had shared with Purcell," the FBI report states. -The Hill

And Mueller mentioned none of this in his report despite knowing about it since 2018 - more than a year before the final report.